Contribute
Register

Black screen after wakeup, and strange audio issue.

Status
Not open for further replies.
Joined
Jan 6, 2013
Messages
47
Motherboard
HP Elitebook 840 G3 (100 series chipset)
CPU
i5 6200
Graphics
Intel HD520 (1920 x 1080)
Sounds like a new problem in 10.13 then.

Thanks Rehabman,

Resolved by putting modified EDID related file into S/L/Display/Content/Resource/Override,
 

RehabMan

Moderator
Joined
May 2, 2012
Messages
183,968
Motherboard
Intel DH67BL
CPU
i7-2600K
Graphics
HD 3000
Mac
  1. MacBook Air
Mobile Phone
  1. iOS
Thanks Rehabman,

Resolved by putting modified EDID related file into S/L/Display/Content/Resource/Override,

Perhaps you should write a guide regarding what you did.
And maybe you can use config.plist/Graphics/EDID/Inject=true, Graphics/EDID/Custom=<modified edid data>.
 
Joined
Jan 6, 2013
Messages
47
Motherboard
HP Elitebook 840 G3 (100 series chipset)
CPU
i5 6200
Graphics
Intel HD520 (1920 x 1080)
Perhaps you should write a guide regarding what you did.
And maybe you can use config.plist/Graphics/EDID/Inject=true, Graphics/EDID/Custom=<modified edid data>.
Yes, just as you said, I tried Clover EDID injection, but it doesn't work, and I found EDID not changed in IORegistryExplorer. that's strange.

later, I'll post here what I've done

thx!

EDIT:

for those who have similar wakeup issue:

1.Get vanilla EDID

2.Find the 21th word, (95 in my case: 00 FF FF FF FF FF FF 00 06 AF 3D 12 00 00 00 00 00 17 01 04 95 1F …)

3.Replace it with a Apple screen’s value(get from FixEDID - MBP worked in my case,MBA not.)

4.Create folder(with file) under /System/Library/Displays/Contents/Resources/Overrides with modified EDID.

5.Reboot & test

I don’t know why it worked

BTW, according to edid description, that word is “Video Input Definition”
 
Last edited:
Joined
Jan 29, 2013
Messages
10
Motherboard
HP-G6
CPU
Intel Core i3-2310m
Graphics
Intel HD3000
Mobile Phone
  1. iOS
Could you please make a detailed tutorial with screenshots?
I am really confused and I have the same problem
 
Joined
Jan 29, 2013
Messages
10
Motherboard
HP-G6
CPU
Intel Core i3-2310m
Graphics
Intel HD3000
Mobile Phone
  1. iOS
I don't get third step. Where is MBP EDID is shown?
 

RehabMan

Moderator
Joined
May 2, 2012
Messages
183,968
Motherboard
Intel DH67BL
CPU
i7-2600K
Graphics
HD 3000
Mac
  1. MacBook Air
Mobile Phone
  1. iOS
Yes, just as you said, I tried Clover EDID injection, but it doesn't work, and I found EDID not changed in IORegistryExplorer. that's strange.

later, I'll post here what I've done

thx!

EDIT:

for those who have similar wakeup issue:

1.Get vanilla EDID

2.Find the 21th word, (95 in my case: 00 FF FF FF FF FF FF 00 06 AF 3D 12 00 00 00 00 00 17 01 04 95 1F …)

3.Replace it with a Apple screen’s value(get from FixEDID - MBP worked in my case,MBA not.)

4.Create folder(with file) under /System/Library/Displays/Contents/Resources/Overrides with modified EDID.

5.Reboot & test

I don’t know why it worked

BTW, according to edid description, that word is “Video Input Definition”

What value did you use in replacement of the '95'?
 
Joined
Jan 6, 2013
Messages
47
Motherboard
HP Elitebook 840 G3 (100 series chipset)
CPU
i5 6200
Graphics
Intel HD520 (1920 x 1080)
Joined
Jun 20, 2012
Messages
101
Motherboard
ASUS FX553VD
CPU
core i7 7700HQ
Graphics
Intel HD 630, NVIDIA 1050
Yes, just as you said, I tried Clover EDID injection, but it doesn't work, and I found EDID not changed in IORegistryExplorer. that's strange.

later, I'll post here what I've done

thx!

EDIT:

for those who have similar wakeup issue:

1.Get vanilla EDID

2.Find the 21th word, (95 in my case: 00 FF FF FF FF FF FF 00 06 AF 3D 12 00 00 00 00 00 17 01 04 95 1F …)

3.Replace it with a Apple screen’s value(get from FixEDID - MBP worked in my case,MBA not.)

4.Create folder(with file) under /System/Library/Displays/Contents/Resources/Overrides with modified EDID.

5.Reboot & test

I don’t know why it worked

BTW, according to edid description, that word is “Video Input Definition”
Could you upload the file plz?
 

RehabMan

Moderator
Joined
May 2, 2012
Messages
183,968
Motherboard
Intel DH67BL
CPU
i7-2600K
Graphics
HD 3000
Mac
  1. MacBook Air
Mobile Phone
  1. iOS
replace it with A5, that's the value of MBP's EDID

So, for byte 20:
(https://en.wikipedia.org/wiki/Extended_Display_Identification_Data)

Video input parameters bitmap
Bit 7=1 Digital input. If set, the following bit definitions apply:
Bits 6–4 Bit depth: 000=undefined, 001=6, 010=8, 011=10, 100=12, 101=14, 110=16 bits per color, 111=reserved
Bits 3–0 Video interface: 0000=undefined, 0001=HDMIa, 0010=HDMIb, 0100=MDDI, 0101=DisplayPort
Bit 7=0 Analog input. If clear, the following bit definitions apply:
Bits 6–5 Video white and sync levels, relative to blank: 00=+0.7/−0.3 V; 01=+0.714/−0.286 V; 10=+1.0/−0.4 V; 11=+0.7/0 V
Bit 4 Blank-to-black setup (pedestal) expected
Bit 3 Separate sync supported
Bit 2 Composite sync (on HSync) supported
Bit 1 Sync on green supported
Bit 0 VSync pulse must be serrated when composite or sync-on-green is used.

0x95 is binary: 1001 0101
0xA5 is binary: 1010 0101

Difference is setting for "Bit depth" in bits 6-4. 0x95 is bit depth 6 (001), 0xA5 is bit depth 8 (010).
 
Status
Not open for further replies.
Top